US 2009/0020978 A1Published application

Gear Shifting System Particularly Adapted to Bicyles

OwnerFranck Savardinventor

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Abstract

A gear shifting system (1) particularly characterized in that the values required for displacement of the gear-shifting elements(s) (e.g. front changer (Y1) and rear changer (Z1)), are applied to each program (s) (e.g.: indexed or non-indexed multibossed cam(s) which is/are integrated into at least one gear shifting elements (Y1) and/or (Z1). Preferably, the system is provided with more than one program (e.g. a cam for the front changer and a cam for the rear changer, both of which can be combined to form a single changer (preferably, a front changer), the programs being synchronized directly or indirectly, e.g. by a single control elements (X) (e.g. an indexed or non-indexed handle) acting via transmission elements (e.g. cables (4A) and (5A) cooperating with casings (6)). The system the performance of the changers by organizing, i.e. synchronizing, the gear ratios via a disk/drive pinion combination potential.

Claims15

Dependent claims

Bicycle equipped with a reduction ratio (gear) shifting system (1), of which at least one reduction ratio (gear) shifting means is a reduction ratio (gear) shifting means according to the invention, such as, for example, a front derailleur connected to its (own or common) transmitter control means and/or a rear derailleur connected to its (own or common) transmitter control means, characterized in that at least one traditional transmitter control means (click or not) and/or a transmitter control means according to the invention act(s) via at least one traditional transmission means (connecting means) and/or according to the invention on at least one gear shifting means (receiver control means) according to the invention that is controlled by at least one program (synchronized or unsynchronized between them if there are several) according to the invention, said program(s) being integrated at least into one of said gear shifting means (receiver control means) according to the invention, being one of the components comprising said gear shifting means.

Dependencies are inferred from the claim text.